FIGURE 1.

Linear regression between feedback gain (α_C, left panels) or feedforward gain (β_C, right panels) and short-term variance of PI (PI v, upper panels) or SBP (SBP v, lower panels) for normotensive (black closed circles) and hypertensive (red open circles) individuals. Determination coefficients, r², and significance of linear trends, p, are reported in each panel. Short-term variances were calculated by averaging, over 24 h, the variance of SBP or PI values in each 6-min running window employed for assessing α_C and β_C.